🚀 From Code to a Real-World Multi-Vendor Marketplace — Building My Own E-Commerce Platform. Over the past few months, Ive been building a full-stack multi-vendor marketplace, focusing on the backend architecture, payment workflows, and the systems that make an e-commerce platform work behind the scenes. This project has been more than just writing code. Ive worked on connecting multiple components into a system where customers, shopkeepers, delivery riders, and administrators can interact seamlessly. 🛠️ Key Features Ive Built ✅ Customer registration, product browsing, cart, checkout, and order management ✅ Multi-vendor architecture with shop-specific order management ✅ Shopkeeper dashboard for managing products, inventory, and orders✅ Rider and delivery management workflows ✅ Admin management for shops, products, customers, and orders ✅ Online payment integration with Razorpay ✅ Payment verification using Razorpay signatures and payment status checks ✅ Multi-shop checkout and payment handling ✅ Order cancellation and refund-related workflows ✅ Role-based access control and protected API routes 💻 Technology Stack Backend: Node.js, Express.js Database: PostgreSQL ORM amp; Migrations: Prisma ORM Payments: Razorpay Payment Gateway Frontend: React.js API Development: REST APIs Authentication amp; Security: JWT-based authentication, role-based authorization, and request validation Development Tools: Git, GitHub, VS Code, PowerShell 🔍 One of the Most Important Engineering Challenges Handling payments correctly in a multi-vendor marketplace. I worked on payment verification, checking payment amounts and currencies, validating Razorpay signatures, preventing duplicate payment processing, and updating checkout and order payment statuses atomically through database transactions. I also implemented seller-side order filtering so that COD orders remain visible while online orders appear only after successful payment confirmation. This helped me understand that building a reliable marketplace isnt just about making features work — its about handling edge cases, maintaining data consistency, and protecting business logic. Every challenge has taught me something new about backend engineering, database transactions, API design, and payment systems. Im continuing to improve the platform, test its workflows, and strengthen its reliability. Building. Testing. Learning. Improving. One feature at a time. LINK:mykasho.com 💻🔥#FullStackDevelopment #NodeJS #ExpressJS #ReactJS #PostgreSQL #PrismaORM #Razorpay #BackendDevelopment #SoftwareEngineering #WebDevelopment #BuildInPublic